Source Excitation of an Open, Parallel-Plate Waveguide.
ILLINOIS UNIV AT URBANA-CHAMPAIGN ELECTROMAGNETICS LAB
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In this work, we consider the problem of an open, finite-width, parallel-plate waveguide which is excited by a y-directed current source. The source current is assumed to be confined at x xo, have a sin N x pi2H or cos N x pi2H variation in the y-direction, and an exp i x Beta x Z behavior along the longitudinal z-direction. Such an excitation can be interpreted as one spectral component of a transversely confined source. The solution to the longitudinally confined source problem can be subsequently constructed by an appropriate superposition of the spectral solutions derived in this paper. The important question of the excitation or non-excitation of the zero-mode in the guide is examined and the resonance condition for a leaky mode in an open, finite-width waveguide is derived.
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